Wheel-rail Safe Interaction Of Running Trains Based On Position Sensitive Device

Railway industry is the main artery of our country’s economy, having significant impact on people’s life. Developing the railway industry, accelerating the modernization of the railway, has enormous significance for the four modernization of our country. With full speed up of the railway system and the fast development of high speed railway, more and more people are starting to focus on the safety of train operation issues. Researching on running locomotive operation safety with scientific means of railway safety escort can help to further ensure safety technology to achieve the goal, to adapt to the requirements of the rapid development of the railway system.This thesis is based on vehicle rail couple dynamics model as theory basement, and based on the principal of position sensitive device, studied the vehicle rail interaction model, overload and unbalanced load model of running trains and the model of calculating derailment coefficient of wheel of train. It simulated the wheel/rail interaction model with SIMPACK software. And it developed an algorithm to calculate the overload and unbalanced load status of running trains and the derailment coefficient of wheel with high speed dynamic detection system.At first, this thesis describes the background and significance of the research, introduced the latest domestic and foreign study of the research in this thesis. And then, it introduced the theory basement of this thesis, the vehicle rail couple dynamics model and how to calculate the overload, unbalanced load and derailment coefficient of running trains. The third chapter is the simulation of vehicle rail couple dynamics model. It mainly simulated the vertical interaction, lateral interaction and calculating the derailment coefficient. It fits these parameters at different speed and rail radius with Matlab, and the results can realize calculating these parameters from straight rails to curve rails. After simulation, this thesis uses experimental platform based on laser-position sensitive device to gather data, then designs an algorithm to process data. The feasibility is proved by the experimental results and simulation results, and the algorithm has a certain amount of reference value for detecting lateral movement running locomotive relevant laws and safety assessment. In the end, it summarizes and looks ahead of this thesis, summarized the main idea of the research of this thesis, and suggested the development of this research.